Data released by the Japanese health department on the 24th showed that the number of measles cases in Japan has been increasing recently, with 43 new confirmed cases in the first seven weeks of this year, higher than the same period last year. The government department announced the patient's itinerary and reminded those with the same trajectory to seek medical advice as soon as possible if they develop symptoms such as fever and rash.
Data from the National Health Crisis Management Research Institute of Japan show that as of February 18, a total of 43 measles cases have been reported in Japan this year. Among them, 13 are imported cases, 22 were infected in Japan, and the place of infection has not yet been determined for 8 cases. From a regional perspective, Tokyo, Osaka Prefecture, Chiba Prefecture and Niigata Prefecture have a higher number of confirmed cases. In terms of age, more than half of the confirmed patients are between 20 and 40 years old.
Government departments in Tokyo, Osaka and other places released the patient's itinerary, reminding people who have been to the same place or took the same means of transportation to pay attention to their physical condition within 21 days after coming into contact with the patient. Once symptoms such as fever and rash occur, promptly report the situation to a medical institution, wear a mask when going to see a doctor and avoid taking public transportation.
According to Japanese media, measles is highly contagious. For susceptible people, one patient can infect 12 to 14 people. The incubation period of measles is usually 10 to 12 days, and can be up to 21 days. Symptoms include fever, upper respiratory tract inflammation, cough, conjunctivitis, etc. In severe cases, it can cause complications such as pneumonia.
Data shows that from 2020 to 2022, the number of measles cases in Japan is at a low level, with no more than 10 confirmed cases each year. It rose to 28 cases in 2023, 45 cases in 2024, and surged to 265 cases in 2025.
